-51.56% is the change from 671 to 325
Calculation steps:
[( 325 - 671 ) ÷ 671] x 100 = -51.56%
Formula
Percentage change = [(325 - 671) / 671] x 100
Subtract the new number by the original number
325 - 671 = -346
-346 ÷ 671 = -0.5156482861400894
-0.5156482861400894 x 100 = -51.56%